endoscopic ultrasound-guided biopsy
Minimally invasive procedure using endoscopic ultrasound to guide tissue sampling of pancreatic and other gastrointestinal neuroendocrine tumors.
Full Definition
Endoscopic ultrasound-guided biopsy (EUS-FNA/FNB) combines high-resolution endoscopic ultrasonography with fine needle aspiration or biopsy to obtain tissue samples from pancreatic and gastrointestinal lesions. This technique is particularly valuable for diagnosing pancreatic neuroendocrine tumors, providing both cytological and histological material for immunohistochemical staining and grading. The procedure offers high diagnostic accuracy while avoiding the risks associated with percutaneous approaches through the peritoneum.
Usage
Usage note: Specify needle type (FNA vs FNB) as core biopsy provides better tissue architecture for grading.
In Context
- "Endoscopic ultrasound-guided biopsy of the pancreatic head mass confirmed a well-differentiated neuroendocrine tumor." — Pathology report
- "The 2-cm pancreatic lesion was deemed suitable for endoscopic ultrasound-guided biopsy given its location and accessibility." — Procedural planning note